Characteristics of lattice thermal conductivity and carrier mobility of undoped PbSe-PbS solid solutions

J. L. Wang, H. Wang, G. J. Snyder, X. Zhang, Z. H. Ni, Y. F. Chen

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Solid solution has been considered as an effective approach to advanced thermoelectrics. However, the benefit from the decrease in lattice thermal conductivity induced by the impurity scattering will be compensated by the reduction in carrier mobility, therefore suppressing the maximum figure of merit (zT). We demonstrate the characteristics of the fundamental properties, including the lattice thermal conductivity and carrier mobility, of undoped PbSe1-xSx solid solutions (0 < x < 1) at room temperature, which provide an efficient way to evaluate the maximum zT of the materials with optimum doping. The lattice thermal conductivity is found to decrease significantly after adding a small amount of PbSe into PbS matrix up to the composition of PbSe0.7S0.3 when the carrier mobility remains virtually unchanged, indicating the beneficial effect of impurity scattering to improve the thermoelectric performance.

Original languageEnglish (US)
Article number405301
JournalJournal of Physics D: Applied Physics
Volume46
Issue number40
DOIs
StatePublished - Oct 9 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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